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Generic Materials Search: zinc products

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View the OMRI Generic Materials List Glossary in PDF format here.
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Zinc Products
Allowed with Restrictions
Crop Fertilizers and Soil Amendments
Synthetic
Zinc carbonate, zinc oxide, zinc silicate, and zinc sulfate may be used to correct a documented zinc deficiency. See also MICRONUTRIENTS – SYNTHETIC listings.
205.601(j)(6)(ii) As plant or soil amendments… Micronutrients—not to be used as a defoliant, herbicide, or desiccant. Those made from nitrates or chlorides are not allowed. Soil deficiency must be documented by testing.
Zinc Products
Prohibited
Crop Fertilizers and Soil Amendments
Synthetic
Zinc ammonium sulfate, zinc chloride, and zinc nitrate are prohibited. See also MICRONUTRIENTS – SYNTHETIC listings and ZINC PRODUCTS.
205.105(a)